Supersnelle erbijsommen en erafsommen tot 20
In de mix
|
1.
11 – 5 =
3
1
6
2
|
2.
15 + 5 =
4
3
2
20
|
3.
7 + 7 =
1
3
14
2
|
4.
19 – 15 =
1
2
4
3
|
|
5.
2 – 2 =
2
0
3
4
|
6.
18 – 7 =
11
3
1
2
|
7.
18 – 12 =
1
2
3
6
|
8.
15 + 0 =
1
2
3
15
|
|
9.
5 – 3 =
3
2
4
1
|
10.
17 + 0 =
4
3
17
2
|
11.
4 + 13 =
17
3
2
4
|
12.
14 + 5 =
3
2
4
19
|
|
13.
19 + 0 =
4
19
3
2
|
14.
9 – 0 =
9
3
2
1
|
15.
2 – 0 =
3
1
4
2
|
16.
19 + 1 =
20
3
4
2
|
|
17.
12 – 12 =
0
3
4
2
|
18.
17 – 10 =
7
2
3
1
|
19.
7 + 4 =
2
1
3
11
|
20.
5 + 10 =
2
3
15
1
|